MEDIUM 6.9 NVD
CVE-2026-47725
nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.3, every /ui/* POST / PUT / PATCH / DELETE route
nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.3, every /ui/* POST / PUT / PATCH / DELETE route processes the request as soon as the session cookie validates. SameSite=Lax on the session cookie prevents most cross-site form submits but does not protect: top-level form-submit navigations from third-party pages (some browsers still send Lax cookies on top-level POSTs); same-registrable-domain attackers (sibling-subdomain XSS, subdomain takeover); the GET /ui/logout route, which a third-party <img src=".../ui/logout"> can force-trigger. This issue has been patched in version 0.3.3.
References
- https://github.com/forgekeep/nebula-mesh/releases/tag/v0.3.3
- https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-273q-qgh5-wrj6
- https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-273q-qgh5-wrj6
This medium severity vulnerability with a CVSS score of 6.9 was published on 2026-07-28 via NVD.
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